OVAL (MRC)
ACSR Motion-Resistant Conductor. Bare Aluminum Conductor, Steel Reinforced.
Application
Southwire's Motion-Resistant Conductor is designed for overhead distribution and transmission lines. It is a galloping- and vibration-resistant, bare aluminum construction, designed for use in overhead applications subject to aeolian vibration and galloping due to wind and ice. Motion-Resistant conductors can be strung to the maximum allowable tension limits without the need for additional vibration protection.
Standards & References
Southwire's Motion-Resistant Conductor meets or exceeds the following ASTM specifications:
- B-230 Aluminum Wire, 1350-H19 for Electrical Purposes
- B-231 Aluminum Conductors, Concentric-Lay-Stranded.
- B-232 Aluminum Conductors, Concentric-Lay-Stranded, Coated Steel Reinforced (ACSR).
- B-498 Zinc-Coated Steel Core Wire for Aluminum Conductors, Steel Reinforced (ACSR).
- B-500 Zinc-Coated (Galvanized), Zinc-5% Aluminum-Mischmetal Alloy-Coated, and Aluminum-Coated (Aluminin Stranded Steel Core for Aluminum Conductors, Steel Reinforced (ACSR).
- B-779 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Steel-Reinforced (ACSR/TW).
Construction
Southwire's Motion-Resistant Conductor is composed of a combination of round and shaped wires of varying diameters and cross-sections. The wires are stranded in such a way to give the cable a spiraling elliptical shape. This spiraling elliptical shape disrupts the forces created by steady cross winds which cause cable vibration, by presenting a continuously changing projected cable diameter to the wind. The spiral shape, together with less torsional stiffness and varying bending stiffness also reduces or eliminates cable galloping due to combined ice and wind loads. High strength steel core and aluminum clad steel core is also available. AAC Motion-Resistant Conductor is available upon request.